Changing Battery and Network Indicators while building a theme with PTB

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Hi Everyone,
I'm new to this forum. I just got my new BB 7130c (and love it), and downloaded PTB to start creating new themes after reading a few threads on this forum.
I started playing around a little bit, but realized that I had to choose a template to start creating the theme, based on the model I was building for. The only issues I have with that, is that I'm not a fan of the wheels they use for the battery and network status indicators (nor do I like the wings very much either).
So the question is: can I create my own status indicator, and if so how? Can I change the status indicators that appear on the templates?